Sander having two or more sander wheels

Abstract

A sander includes two sander wheels of different sanding devices are rotatable secured on top of a frame. A work table is slidably disposed in the frame for supporting work pieces and for moving the work pieces toward the sander wheels. A pair of rollers are rotatable supported beside the sander wheels for feeding the work pieces passing through the sander wheels. A motor is coupled to the sander wheels and the rollers for driving the sander wheels and the rollers simultaneously. A reduction gearing is coupled to the rollers to drive the rollers in a reduced speed.

I claim: 
     
       1. A sander comprising: a) a frame including a pair of posts,   b) a housing disposed on top of said frame.   c) a front sander wheel and at least one rear sander wheel rotatably secured in said housing,   d) a work table slidably received in said frame for supporting work pieces, said work table being slidably secured on said posts to move up and down along said posts,   e) means for moving said work table upward toward and downward away from said sander wheels, said moving means including: i) a pair of bolts threaded through said work table, said bolts each including a bevel gear secured thereto,   ii) a rod laterally and rotatable disposed in said frame, said rod including two bevel gears secured thereto and engaged with said bevel gears of said bolts to couple said bolts together, and   iii) a handle secured to a first of said bolts and to move said work table up and down by rotating said bolts simultaneously,     f) means for feeding the work pieces passing through said sander wheels, and   g) means for driving said front sander wheel and said at least one rear sander wheel to work on the work pieces.   
     
     
       2. A sander according to claim 1, wherein said frame includes a pair of posts, said work table is slidably secured to said posts and to move up and down along said posts, said moving means includes at least one bolt threaded through said work table, and means for rotating said at least one bolt to move said work table up and down. 
     
     
       3. A sander according to claim 2, wherein said rotating means includes a handle secured to said at least one bolt for rotating said at least one bolt. 
     
     
       4. A sander according to claim 1, wherein said front sander wheel and said rear sander wheel are each rotatably secured in said housing at a pivot shaft, said driving means includes a motor, and means for coupling said motor to said pivot shafts, said front sander wheel and said at least one rear sander wheel are driven by said motor simultaneously. 
     
     
       5. A sander according to claim 4, wherein said feeding means includes a pair of rollers each rotatably secured in said housing at a pivot shaft, and a reduction gearing means for coupling said pivot shafts of said front sander wheel and said at least one rear sander wheel to said pivot shafts of said rollers and to driven said rollers in a reduced rotational speed. 
     
     
       6. A sander according to claim 1, wherein said front sander wheel and said at least one rear sander wheel include different sanding devices.